panic: ffs_blkfree: freeing free frag Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *418394 95630 0 0x10000002 0 0 sshd db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259 ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325 ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403 VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210 vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180 doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163 sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065 syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x724c3a85dee0, count: 4 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: ffs_blkfree: freeing free frag ddb> show kasan No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259 ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325 ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403 VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210 vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180 doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163 sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065 syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x724c3a85dee0, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a7b7280 rbx 0x2560 __ALIGN_SIZE+0x1560 rdx 0 rcx 0 rax 0xffff80002a772fa0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x27f61003fdf2938c r11 0x3708f4ff3aa434b r12 0 r13 0x90255 acpi_pdirpa+0x7c0c6 r14 0 r15 0x1 rip 0xffffffff8330a1a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a7b7270 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (sshd) tid=418394 pid=95630 tcnt=1 stat=onproc flags process=10000002 proc=0 runpri=17, usrpri=51, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a772a70,0xffff80002a773248 process=0xffff80002a79f610 user=0xffff80002a7b2000, vmspace=0xfffff1007661da18 estcpu=1, cpticks=3, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 38066 410878 75320 0 2 0 0 syz-executor 38066 482693 75320 0 2 0 0x4000000 syz-executor 63900 381196 76351 0 2 0 0 syz-executor 64959 463962 1 0 3 0 0x80 nanoslp init 11968 382064 57852 0 3 0x11 0x80 nanoslp syz-executor 11968 401903 57852 0 3 0x11 0x4000080 fsleep syz-executor 11968 491535 57852 0 2 0x11 0x4000000 syz-executor 11968 379541 57852 0 3 0x11 0x4000080 fsleep syz-executor 64510 42329 21620 0 2 0 0 syz-executor 64510 514353 21620 0 3 0 0x4000080 fsleep syz-executor 65367 265929 94507 0 3 0x1000 0x4080000 smrbar syz-executor 65367 47514 94507 0 3 0x1000 0x4002000 suspend syz-executor 15314 40111 11987 60929 3 0x10 0x80 nanoslp syz-executor 15314 281021 11987 60929 3 0x10 0x4000080 fsleep syz-executor 76351 191820 69091 0 2 0x2 0 syz-executor 5257 21410 69091 0 3 0x2 0x80 nanoslp syz-executor 11987 102010 69091 0 3 0x2 0x80 nanoslp syz-executor 75320 442030 69091 0 3 0x2 0x80 nanoslp syz-executor 89154 412896 69091 0 2 0x2 0 syz-executor 57852 418624 69091 0 3 0x2 0x80 nanoslp syz-executor 21620 374677 69091 0 3 0x2 0x80 nanoslp syz-executor 94507 282065 69091 0 3 0x2 0x80 nanoslp syz-executor 69091 516889 1 0 3 0x2 0x80 kqread syz-executor *95630 418394 1 0 7 0x10000002 0 sshd 51484 146087 83960 73 3 0x1100010 0x80 kqread syslogd 83960 434526 1 0 3 0x100002 0x80 sbwait syslogd 58523 91563 1 0 3 0x100000 0x80 kqread resolvd 73582 252192 42675 77 3 0x100012 0x80 kqread dhcpleased 79468 43127 42675 77 3 0x100012 0x80 kqread dhcpleased 42675 470962 1 0 3 0 0x80 kqread dhcpleased 80907 109324 0 0 3 0x14000 0x200 bored smr 61104 316474 0 0 2 0x14000 0x200 zerothread 79297 76410 0 0 3 0x14000 0x200 aiodoned aiodoned 99447 83818 0 0 3 0x14000 0x200 syncer update 56623 142315 0 0 3 0x14000 0x200 cleaner cleaner 57193 167900 0 0 3 0x14000 0x200 reaper reaper 43272 48417 0 0 3 0x14000 0x200 pgdaemon pagedaemon 90320 373657 0 0 3 0x14000 0x200 bored viomb 56109 332086 0 0 3 0x14000 0x40000200 acpi0 acpi0 83149 186554 0 0 3 0x14000 0x200 bored softnet0 19837 415764 0 0 3 0x14000 0x200 bored systqmp 72900 175188 0 0 3 0x14000 0x200 bored systq 18835 308152 0 0 3 0x14000 0x40000200 tmoslp softclock 68271 228798 0 0 3 0x14000 0x40000200 idle0 1 329672 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11064 12110K 12280K 166960K 12334 0 pcb 18 13K 14K 166960K 103 0 rtable 253 8K 8K 166960K 400 0 pf 34 13K 20K 166960K 68 0 ifaddr 43 7K 7K 166960K 46 0 ifgroup 55 2K 2K 166960K 60 0 sysctl 3 1K 9K 166960K 9 0 counters 34 17K 18K 166960K 37 0 ioctlops 0 0K 4K 166960K 75 0 iov 0 0K 12K 166960K 76 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1301 82K 82K 166960K 1481 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 97K 166960K 317 0 sigio 0 0K 0K 166960K 4 0 proc 51 50K 124K 166960K 510 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 27 0 in_multi 99 6K 7K 166960K 106 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 381 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 189 121K 152K 166960K 4599 0 UVM aobj 7 2K 4K 166960K 8 0 pinsyscall 32 64K 96K 166960K 1427 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 10 0 NDP 12 0K 2K 166960K 29 0 temp 36 9112K 9122K 166960K 4323 0 kqueue 13 20K 28K 166960K 62 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 51 0 47 1 0 1 1 0 8 0 rtentry 136 118 0 6 4 0 4 4 0 8 0 unpcb 144 156 0 140 1 0 1 1 0 8 0 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpcb 736 82 0 78 4 3 1 4 0 8 0 arp 96 19 0 1 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 264 0 256 7 5 2 7 0 8 0 nd6 112 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 3 0 3 1 0 1 1 0 8 1 pfstscr 40 3 0 1 1 0 1 1 0 8 0 pfrktable 1344 2 0 2 1 1 0 1 0 8 0 pfanchor 1288 5 0 0 1 0 1 1 0 8 0 pftag 88 3 0 2 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 2 1 0 1 1 0 8 0 pfstate 384 3 0 1 1 0 1 1 0 8 0 pfrule 1360 5 0 5 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 455 0 2 29 0 29 29 0 8 0 art_table 40 458 0 2 5 0 5 5 0 8 0 art_node 32 117 0 15 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 72 14 0 4 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1883 0 423 92 0 92 92 0 8 0 ffsino 256 1883 0 423 92 0 92 92 0 8 0 nchpl 144 2324 0 624 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2033 0 0 113 0 113 113 0 8 0 namei 1024 7551 0 7550 2 1 1 1 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 kstatmem 264 27 0 2 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 7841 0 7841 3 2 1 3 1 8 1 plimitpl 152 124 0 109 1 0 1 1 0 8 0 sigapl 424 615 0 575 6 1 5 6 0 8 0 knotepl 120 10785 0 10742 26 15 11 19 0 8 8 kqueuepl 184 61 0 50 1 0 1 1 0 8 0 pipepl 304 138 0 111 3 0 3 3 0 8 0 fdescpl 448 602 0 576 5 1 4 5 0 8 0 filepl 120 3031 0 2815 10 1 9 9 0 8 1 lockfpl 104 53 0 51 1 0 1 1 0 8 0 lockfspl 48 25 0 23 1 0 1 1 0 8 0 sessionpl 144 35 0 27 1 0 1 1 0 8 0 pgrppl 48 45 0 29 1 0 1 1 0 8 0 ucredpl 104 410 0 397 1 0 1 1 0 8 0 zombiepl 144 577 0 575 2 1 1 1 0 8 0 processpl 1152 615 0 575 4 0 4 4 0 8 0 procpl 664 891 0 843 6 1 5 6 0 8 0 sockpl 552 481 0 453 8 5 3 8 0 8 0 mcl64k 65536 5 0 5 2 1 1 1 0 8 1 mcl8k 8192 9 0 9 2 1 1 1 0 8 1 mcl4k 4096 2771 0 2721 14 7 7 14 0 8 0 mcl2k 2048 252 0 251 1 0 1 1 0 8 0 mextrefs 64 111 0 110 1 0 1 1 0 8 0 mtagpl 96 5 0 5 1 1 0 1 0 8 0 mbufpl 256 8088 0 7945 25 7 18 18 0 8 6 bufpl 272 2657 0 102 171 0 171 171 0 8 0 anonpl 24 108993 0 106420 46 19 27 46 0 187 0 amapchunkpl 152 13990 0 13590 32 11 21 32 0 158 1 amappl16 200 1644 0 1619 14 11 3 14 0 8 0 amappl15 192 24 0 24 1 1 0 1 0 8 0 amappl14 184 410 0 410 1 0 1 1 0 8 1 amappl13 176 145 0 138 1 0 1 1 0 8 0 amappl12 168 851 0 828 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 61 0 51 1 0 1 1 0 8 0 amappl9 144 275 0 274 1 0 1 1 0 8 0 amappl8 136 116 0 114 1 0 1 1 0 8 0 amappl7 128 146 0 136 1 0 1 1 0 8 0 amappl6 120 148 0 147 1 0 1 1 0 8 0 amappl5 112 88 0 83 1 0 1 1 0 8 0 amappl4 104 275 0 259 1 0 1 1 0 8 0 amappl3 96 2560 0 2470 4 1 3 4 0 8 0 amappl2 88 535 0 492 2 0 2 2 0 8 0 amappl1 80 11075 0 10721 14 2 12 14 0 8 1 amappl 88 3863 0 3725 5 0 5 5 0 92 0 uvmvnodes 80 100 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 602 0 576 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 602 0 576 1 0 1 1 0 8 0 vmmpekpl 168 6715 0 6680 2 0 2 2 0 8 0 vmmpepl 168 46723 0 45317 92 11 81 91 0 357 7 vmsppl 368 601 0 576 4 1 3 4 0 8 0 rwobjpl 40 15964 0 15206 13 2 11 13 0 8 0 pdppl 4096 1210 0 1152 96 30 66 82 0 8 8 pvpl 32 278859 0 271894 116 25 91 116 0 265 12 pmappl 216 601 0 576 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 551 0 56 15 0 15 15 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259 ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325 ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403 VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210 vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180 doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163 sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065 syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x724c3a85dee0, count: -11 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8348d3eb) at panic+0x1cf sys/kern/subr_prf.c:198 ffs_blkfree(fffff1006fb74300,91405,800) at ffs_blkfree+0xce9 sys/ufs/ffs/ffs_alloc.c:1259 ffs_truncate(fffff1006fb74300,0,0,fffff10007ffd9c0) at ffs_truncate+0x1390 sys/ufs/ffs/ffs_inode.c:325 ufs_setattr(ffff80002a7b7670) at ufs_setattr+0x8e0 sys/ufs/ufs/ufs_vnops.c:403 VOP_SETATTR(fffff100678a9ce8,ffff80002a7b76f0,fffff10007ffd9c0,ffff80002a772fa0) at VOP_SETATTR+0x112 sys/kern/vfs_vops.c:210 vn_open(ffff80002a7b78d0,602,1a4) at vn_open+0x6b0 sys/kern/vfs_vnops.c:180 doopenat(ffff80002a772fa0,ffffff9c,c92ffa0140,601,1b6,0,f0b8f6c61743b05c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1163 sys_open(ffff80002a772fa0,ffff80002a7b7b70,ffff80002a7b7ac0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1065 syscall(ffff80002a7b7b70) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7b7b70) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x724c3a85dee0, count: -11 ddb>